215134450 has 24 divisors (see below), whose sum is σ = 400897332. Its totient is φ = 85893120.

The previous prime is 215134429. The next prime is 215134453. The reversal of 215134450 is 54431512.

It is a happy number.

215134450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 130439241 + 84695209 = 11421^2 + 9203^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215134453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25122 + ... + 32578.

Almost surely, 2^215134450 is an apocalyptic number.

215134450 is a deficient number, since it is larger than the sum of its proper divisors (185762882).

215134450 is a wasteful number, since it uses less digits than its factorization.

215134450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8046 (or 8041 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 215134450 is about 14667.4622890260. The cubic root of 215134450 is about 599.1974919280.

Adding to 215134450 its reverse (54431512), we get a palindrome (269565962).

The spelling of 215134450 in words is "two hundred fifteen million, one hundred thirty-four thousand, four hundred fifty".